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Delay overlap errors if errors are involved

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This commit is contained in:
Michael Goulet 2023-03-19 02:20:15 +00:00
parent 322c7b6269
commit 9174edbae9
3 changed files with 15 additions and 8 deletions
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6
compiler/rustc_trait_selection/src/traits/specialize/mod.rs
View File

@ -22,7 +22,7 @@ use crate::traits::{
use rustc_data_structures::fx::FxIndexSet;
use rustc_errors::{error_code, DelayDm, Diagnostic};
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_middle::ty::{self, ImplSubject, Ty, TyCtxt};
use rustc_middle::ty::{self, ImplSubject, Ty, TyCtxt, TypeVisitableExt};
use rustc_middle::ty::{InternalSubsts, SubstsRef};
use rustc_session::lint::builtin::COHERENCE_LEAK_CHECK;
use rustc_session::lint::builtin::ORDER_DEPENDENT_TRAIT_OBJECTS;
@ -350,6 +350,10 @@ fn report_conflicting_impls<'tcx>(
impl_span: Span,
err: &mut Diagnostic,
) {
if (overlap.trait_ref, overlap.self_ty).references_error() {
err.downgrade_to_delayed_bug();
}
match tcx.span_of_impl(overlap.with_impl) {
Ok(span) => {
err.span_label(span, "first implementation here");

2
tests/ui/specialization/min_specialization/bad-const-wf-doesnt-specialize.rs
View File

@ -6,7 +6,7 @@
struct S<const L: usize>;
impl<const N: i32> Copy for S<N> {}
//~^ ERROR the constant `N` is not of type `usize`
impl<const M: usize> Copy for S<M> {}
//~^ ERROR conflicting implementations of trait `Copy` for type `S<[const error]>`
fn main() {}

15
tests/ui/specialization/min_specialization/bad-const-wf-doesnt-specialize.stderr
View File

@ -1,11 +1,14 @@
error[E0119]: conflicting implementations of trait `Copy` for type `S<[const error]>`
--> $DIR/bad-const-wf-doesnt-specialize.rs:9:1
error: the constant `N` is not of type `usize`
--> $DIR/bad-const-wf-doesnt-specialize.rs:8:29
|
LL | impl<const N: i32> Copy for S<N> {}
| -------------------------------- first implementation here
LL | impl<const M: usize> Copy for S<M> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `S<[const error]>`
| ^^^^
|
note: required by a bound in `S`
--> $DIR/bad-const-wf-doesnt-specialize.rs:6:10
|
LL | struct S<const L: usize>;
| ^^^^^^^^^^^^^^ required by this bound in `S`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0119`.